Box-nailing machine



A. NMRIGGS.

BOX NAILING MACHINE. APPLICATIION FILED JUNE 2, 1919.

Patented N (W. 15, 1921.,

2 SHEETSSHEET 1- FIG. 1

HR THU/P IV. 1576 as dam;

A. N. RIGGS.

BOX NAILING MACHINE.

APPLICATION FILED JUNE 2. I919.

Patented Nov. 15, 1921..

2 SHEETSSHEET 2.

warren STATES PATENT caries.

ARTHUR 1\T. RIGG S, 0F CENTRALIA, WASHINGTON.

BOX-NAILING MACHINE.

T0 allwhom'it may concern:

Be it known that I, ARTHUR N. RIGGS, a citizen of the United States, and resident of the city of Centralia, county of Lewis, State of Washington, have invented certain new and useful Improvements in Box-Nailing Machines, of which the following is a specification.

My invention relates to nailing apparatus, particularly of the sort which is employed in nailing boxes by machinery.

The object of my invention is to provide means such that the nail driving mechanisms are automatically controlled or adjusted, so that the finish of the driving movement is at all times flush with the surface of the parts being nailed together, irrespective of the variations in dimension of these parts of the sort that is likely to occur due to imperfect cutting or dressing of the boards The features of my invention which 1 deem to be new will be hereinafter described in an embodiment thereof which is simple in its construction and which serves to illustrate the principle of my invention. Such construction is shown in the accompanying drawings.

Figure l-is a front view of the parts of a box nailing machine which contains the mechanisms which constitute and are directly related to my invention.

Fig. 2 is a side or edge view of the parts shown in Fig. 1.

Fig. 3 is a sectional side elevation of the parts which constitute the nail turning and feeding mechanism and the nail driving mechanisms.

Fig. 4 is a top or plan view on line 47-41; of Fig. 3.

Fig. 5 is a section taken upon the line 5--5 of Fig. 3, and Fig. 6 is a section taken upon the line 66 of Fig. 5.

In the simpler forms of box nailing machines which are principally used, the. nails are driven only from above into the upper side of the box. This makes it necessary to turn the box the opposite side up in order to nail the opposite sides together. My invention is intended to provide such machines with mechanisms whereby the top and bottom sides of a box may be nailed at the same time, thus doubling the working capacity of the machine.

I have not herein illustrated. nor will I describe, the mechanism for feeding or supplying the nails to the nailing apparatus, except Specification of Letters Patent.

Patented Nov. 15, 1921.. 1919. Serial no. 301,160.

so far as this includes that portion of the delivery chutes which contain the nail invertlng or turning mechanisms, as such mechanisms are old in the art. Such mechanlsms as I have referred to deliver the nails one ata time, point downward. It is, therefore, a simple matter to deliver these nails to the nailing positions at the upper side of a box, as such nails should, when driven, be in vertical position with the heads up. It is,

however, necessary to turn or invert these nails if they are to be driven into the box from below.

In the drawing 1 represents a portion of the nail delivery chute to which nails are singly fed by any type of nail selecting and feeding mechanism. The tubular member 10 forms that portion of the nail feeding chute through which the nail is delivered to the driving mechanism. The two sections of the nail chute land 10 meet in a converging direction. They are joined through common connection with the nail turning chamber 11. That portion of the chute 1 which delivers the nail-to this turning chamber, connects therewith at its upper part, while the deliverysection 10 communicates with the lower part thereof.

This nail turning chamber 11 is preferably made of triangular outline as seen from one side. I have shown at 12, 12 and 12 three different positions of a nail, illustrating what occurs during the process of feeding the nail and turning the same. The nail coming down the upper section 1 of the chute, is delivered in an inclined direction approximating toward the horizontal, point forward. When it enters the turning chamber 11 it does so with such velocity as to carryit well clear ofthe curved section of the chute 1 before it strikes the opposite inclined bottom of chamber 11. At the point shown at 12, which represents this condition, the point of the nail is supported by the bottom of the chamber 11; thehead being unsupported, will drop down and the nail will slide down the inclined bottom of the chamber 11 and be delivered through the chute 10 to the nail placing and driving mechanism.

The box being nailed is placed between an upper bar 20 and a lower bar 2. The upper bar 20 represents the upper bar of a nailing machine of the type referred to, and ordinarily would be provided with suitable nailing mechanisms. However, I have not 111us= surface as shown at 25. I 23 and 24 is placed a beveled or tapered bar trated such nailing mechanisms, as these would in no sense be novel and form no essential part of my invention.

As herein illustrated this upper bar 20 is to be fixedly secured to the main frame of which the bar 21 represents a part.

The lower bar 2 is mounted so as to be movable vertically upon guides, which guides as herein illustrated, consist of or employ the bars 21. The amount of this movement may be but-slight, the same being sufiicient' to separate the bars 2 and 20 enough to make it easy to insert the box parts for nailing.

I have shown the bar 2 as being connected, through the medium of rods 22, with another bar or sliding member 23, which is also mounted to slide upon vertical guides,which may also be the bars 21. A slight distance below the bar 23 is across bar 24 which is fixed to the frame and has an upper inclined Between the bars 26. This bar is given a reciprocating move ment in such a manner as to raise and lower the sliding bar 23. The manner of giving it this movement is immaterial. Any suitable mechanism for giving the bar 23. the slight vertical movement necessary for the box clamping movement may be substituted for that described. The mechanism which-has been described for securing the desired result is only given as illustrative of a simple form of mechanism for doing'this result and not with any intention of limiting my invention to this particular type of mechanisms. The mechanisms illustrated for reciprocating the tapered lifting bar 26 consist of a handle 27. This also is merely illustrative of a simple form of mechanism for securing this result.

The reciprocating bar 2, which is placed under the end of the box and which engages with the lower surface of the box, being nailed, as explained, is given a limited amount of vertical movement in order to provide a su'flicient opening for easy insertion of the box and then to engage similarly with the parts of the box so as to hold them firmly in position while being nailed. This bar is provided with a series of holes 28 which form nail re ceiving sockets and also guides for the nail driving pins 3. These nail driving pins 3, as illustrated, consist of round steel bars. At a suitable time these are given a reciproeating-movement in the guide sockets or bores 28, so as to force the nail 12 which is contained therein into the box.

Suitably supported and guided in the upper edge of the bar2 is the nail placing and guiding mechanism which is contained with in a reciprocating block 4. This block 4 is intended to reciprocate across the upper end of the nail receiving sockets 28. Each of the blocks 4, as herein shown and as it is preferred to make them, contains a nail receiving and transferring socket 40 and a nail centering mechanism, and the block is reciprocated so as to bring these two mechanisms successively and alternately into alinement with the nail receiving socket 28. In the position shown in Fig. 3, this block is in the position in which the nail receiving and transferring socket 40 carried thereby is in position to receive a nail from the nail feeding mechanisms and the nail centering and guiding mechanism is in the position occupied thereby when the nail is'driven.

The nail receiving and transferring socket 40 is a tubular member of such length as to receive the nails being employed and said member is preferably provided with enlarged upper end as shown. The lower end of this member 40 extends to the extreme lower edge of the block 4. When it is in the position 42 placed at the outer ends thereof and are properly centered by means of a suitable stop which prevents them from being moved beyond the center line. Such a stop is shown in Jig. 6 and consists of a rib 'or pin 43 which projects into the channel in which the blocks 41 reciprocate, the blocks 41 being suitably notched at their edges to receive said projection. The meeting edges of the two blocks 41 are bored out or recessed so as to form a conical opening 44 facing downwardly and in alinement with the nail receiving socket 28 when the parts are in position for driving the nails. The upper end of this conical recess is drawn down to a small size, the same being essentially or approximately the size of the shank of the nailsbeing used.

This particular construction which forms the nail guiding and centering mechanisms has been described to more fully describe the exact construction of the parts used by applicant. Any other suitable type of nail centering and guiding mechanism which is found applicable may beemployed instead of that which has been described.

It is evident that with the nails placed in the sockets 28 as shown,"if the nail driving bars .or pins 3 be forced'upwardlythey would be driven into the box. I have indicated, the position of the head of the box by the dotted line at 5, and show a side of the box by the dotte e he mechanism employed 13c for operating these nail driving pins 3 is as follows:

The lower ends of these pins 3 are secured to a bar 30, which bar is mounted to slide upon vertical guides, these guides, as herein illustrated, being the bars 21 of the frame. The nail driving pins are all compelled to move together. It is possible, with such a construction to so adjust the position of the nail driving pins 3 that the upper or driving ends thereof shall be in exact alinement and by properly regulating the length of movement given to them in driving the nails, these ends may be brought exactly flush with the upper surface of the bar 2, that is exactly flush with the bottom surface of the box being nailed. If this be done it is insured that the nails be driven entirely home and yet, to not have their heads recessed into the surface of the box.

The means whereby this result is secured involves mounting the actuating mechanisms for these nails in exact relationship with the bar 2, and then giving these actuating means a fixed and definite movement. In consequence, if the position of the bar 2 be varied when it comes in contact with the box, by reason of variation in thickness of the parts forming the box, the nails will nevertheless be driven so as to be flush with the surface of the box without projecting or recessing the same.

The means for actuating these nail driving pins 3 which has been herein shown consists of connecting the bar30 with the bar 23, which latter bar is fixedly connected with the bar 2 through toggle levers 6, which levers are actuated by a. bar 60 driven through any suitable mechanism which will give a uniform amount of movement. By reason of the fact that the bar 23 which forms the abutment against which the actuating mechanism of the nail driving members act, is fixed in definite relation with the bar 2, it will be varied in position by reason of the different dimensions of the box parts, exactly as the bar 3 is similarly varied in position. By reason of the fact that the driving mechanism has a uniform reciprocating movement the exact location of the nail heads with reference to the surface of the box is secured.

The nails being delivered through a chute 12 and turned or reversed in position in the chamber 11 are then delivered to the transferring mechanisms, which consist of a block 4, and the parts carried thereby. By the reciprocation of this block they are delivered to the socket 28 in which the nail driving pins reciprocate and are driven by the reciprocation of said pins.

By the use of the above mechanisms, it is possible to supply the nails for nailing the bottom side of a box at the same time that the top side is nailed, thus doubling the capacity of the machine. It is believed that the operation of the parts which have herein been described is clear and that further detail description thereof is hardly necessary.

What I claim as my invention is:

1. In a nail driving machine, in combination with a frame structure, an upper clamping member fixed to said frame and a lower clamping member slidable thereon between which the parts of a box may be held for nailing, a cross bar slidable on the frame, below and having fixed relation to the lower clamping member, means for moving the said cross bar to adjust the lower clamping member toward or from the other to clamp the box parts, and a nail driving means carried'by the cross bar.

2. In a nail driving machine, in combination with a frame structure, an upper clamping member fixed to said frame, and a lower clamping member slidable thereon, between which the parts of a box may be held for nailing, a cross bar fixed to the frame at some distance below the movable clamping member, upper and lower nailing bars slidable on the frame between the latter fixed bar and lower clamping bar; the lower one 

